Artificial marble and process of making the same.



UNITED STATES AUGUST RIESCH, OF MUNICH, GERMANY.

ARTIFICIAL MARBLE AND PROCESS OF MAKING THE SAME.

Specification 01' Iietters Patent.

Patented Sept. 1, 1908.

Application filed November 4, 1907. Serial No. !00,581.

maybe used for the covering of floors,-

table tops, and such articles, and which in use. willnot crack readily.

In carrying out my invention I first form 'a body of a mixture of material, which when moistened will form into minute particles. Then I sprinkle the particles with a dry coloring matter, which will form a coating or shell around each of the said particles, so that when 'the composition is spread over the surface to l e-coated, the spreading or flattening out of these minute articles will form veins of oolorm materia which will resemble the veins 0 naturalmarble upon the, setting or hardening of the composition. The body material is formed of cement, saw-dust and. mineral filling matter. These substances are mixed together in the following proportions: To ca. 9 parts of cement I add ca. 20 parts of saw dust and ca. 1. part of mineral filling matter. The kind of cemcnt base I prefer to use is oxid of .magne sium. The kind of mineral filling matter I prefer to use is white stone-dust, like limedust or asbestos etc. The saw-dust should be of the fineness of powder, that is, the par ticlcs should not be. more than. a millimeter in diameter. After I have mixed the ce-- ment, the saw-dust and the mineral. filling matter together as aforesaid, I moisten them with a solution of chlorid of magnesium. In so noistening the mixture I use only enough of the solution of chlorid of magnesium to cause the materials to cohere in. minute particles, giving it the appearance of being made up of minute globules. I prefer to use a solution of chlorid-of magnesium which contains ca. 62517.00 parts of the said salt to ca; 7 .75ca. 9 parts of water. To cause the solution of chlorid of magnesium to mix with-the magnesium oxid, the mineral filling material and'the powered sawdust, I stir them I together gently While, adding the fluid, thereby "causing the mass intake on a granulated appearance, and I exercise care notto mash and mineral filling these particles or granules. After the body material has been thus moistened with the chlorid of magnesium, I sprinkle the particles with a dry coloring matter, so that the particles become coated with thisjcolorin matter. To make the coloring matter prefer to use oxid of magnesium and a powdered filling material. This filling material is preferably mineral matter. In mix ing this dry coloringmatter with the foundation material, one must be careful to avoid kneading the substances together. He must sprinkle the said coloring matter over the foundation material in a .manner such that the particles of the foundation material are coated with the coloring matter. When the composition thus prepared is placed upon the surface to be coated, the composition is flattened out so that the particles or small.

spherical bodies are flattened out so as to fill in the interstices occurring between the bodies. In so doing, the coloring'material will'be filled into the interstices so as to give the product veins of color resembling the veins of natural marble.

While I have described magnesium oxidas the cement base, and a solution of magnesium chlorid as the fluid for causin the mixture of powdered sawdust and t 1e cement base to cohere the particles, Ido not wish to limit myself to the use of these substances, since other cement bases, or other fluids, may be used, within the scope of my invention.

What I claim is:

1. A process of making artificial marble, consisting in mixing sawdust, a cement base, material together, then moistening this mixture with a solution of a haloid salt and mixing them so as to cause the mixture to (ZOlIGI'Q. ingranules, then coating the granules with a coloring material.

2. A process of making artificial marble, consisting in mixing sawdust, a cement base, and a mineral filling'material together, then moistcning this'nuxture with a solution of chlorid of magnesium and mixing them together so as to cause the mixture to cohere' in granules, then s rinkling the granules with a dry mineral c0 oring matter.

3. A process of making artificial marble, consistin in. mixing sawdust, cement and mineral illing material together, then mois-- teni this mixture with a solution of a then coating the granules 'aium'oxid and a mineral filling material to give thein a coating of color.

4'. A process of lnakin artificial marble, consisting in mixing pow ered sawdust and a cement base together in a dry state, then adding to this mixture a solution of a haloid saltand stirling-theml together so as to cause the mixture to eohereingranules, and with a coloring matter.

5. A composition consisting of a body made of saw-dust, material made to cohere in ranules by mixing then with a solution o ahaloid salt of cement and mineral filling magnesium, and a coating for the partieles 15 

